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feat(core): diagnose prompt cache prefix changes (#39139)

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Kit Langton 2026-07-27 13:44:02 -04:00 • committed by GitHub
commit 7eb51d0507
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4 changed files with 180 additions and 1 deletions
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7
packages/core/test/session-runner.test.ts
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@ -42,6 +42,7 @@ import { SessionRunCoordinator } from "@opencode-ai/core/session/run-coordinator
import { SessionRunner } from "@opencode-ai/core/session/runner"
import * as SessionRunnerLLM from "@opencode-ai/core/session/runner/llm"
import { SessionRunnerModel } from "@opencode-ai/core/session/runner/model"
import { PromptCacheDiagnostics } from "@opencode-ai/core/session/prompt-cache-diagnostics"
import { SessionUsage } from "@opencode-ai/core/session/usage"
import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor"
import { PluginHooks } from "@opencode-ai/core/plugin/hooks"
@ -1315,6 +1316,12 @@ describe("SessionRunnerLLM", () => {
yield* admit(session, "Second")
yield* session.resume(sessionID)
expect(
PromptCacheDiagnostics.compare(
PromptCacheDiagnostics.snapshot(requests[0]!),
PromptCacheDiagnostics.snapshot(requests[1]!),
),
).toEqual({ status: "append-only", previousMessages: 1, currentMessages: 3 })
expect(requests.map((request) => request.system.map((part) => part.text))).toEqual([
[defaultSystem, "Initial context"],
[defaultSystem, "Initial context"],